ruby-on-rails - 回形针+头像

Question

我发现这个教程 (http://www.coffeepowered.net/2009/02/15/graceful-degredation-using-gravatar-as-a-fallback-avatar-with-paperclip/) 关于将 gravatar 作为启用回形针的模型的默认图像实现，但是在实现时我看到消息“undefined method ‘match’ for [:format, :png]:Array” .这篇文章有什么问题吗？

Answer 1

我更新了代码，使您更容易理解和调试。

Paperclip.interpolates(:gravatar_url) do |attachment, style|
  size = nil
  # style should be :tiny, :small, or :regular
  # size_data is assumed to be "16x16#", "20x20#", or "25x25#", i.e., a string
  size_data = attachment.styles[style][:geometry]
  if size_data
    # get the width of the attachment in pixels
    if thumb_size = size_data.match(/\d+/).to_a.first
      size = thumb_size.to_i
    end
  end
  # obtain the url from the model
  # replace nil with "identicon", "monsterid", or "wavatar" as desired
  # personally I would reorder the parameters so that size is first
  # and default is second
  attachment.instance.gravatar_url(nil, size)
end